CFD-101 - Sony Audio Service Manual (repair manual). Page 19

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The following is a simple adjustment method.

Since exact adjustment cannot be performed, remember the
positions of the controls before performing the adjustment.
If the positions after the simple adjustment are only a little
different, return the controls to the original position.

1. Keep the set horizontal.

If the set not horizontal, this adjustment cannot be performed due
to the gravity against the 2-axis device.

2. Insert disc (YEDS-18) and push the 

fl button.

3. Connect the oscilloscope between TP (FE) and TP (VC).
4. Adjustment RV702 so that the waveform is as shown in the figure

below. (focus gain adjustment)

• Correct Example

5. Connect the osilloscope between TP (TE) and TP (VC).
6. Adjust RV704 so that the waveform is as shown in the figure below.

(tracking gain adjustment)

• Correct Example

oscilloscope

(DC range)

CD board

TP (FE)(IC701 

1

)

TP (TE)(IC701 

$¢

)

TP (VC)(IC701 

$•

)

• Incorrect Examples (DC level changes more than on adjusted
  waveform)

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

0 V

100 mV

0 V

250 mV

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

0 V

75 mV

100 mV

• Incorrect Examples (fundamental wave appears)

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

0 V

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

0 V

0 V

VOLT/DIV : 100 mV
TIME/DIV : 2 mS

Adjustment Location : See page 20.

low focus gain

high focus gain

low tracking gain

high tracking gain

(higher fundamental wave than for low gain)